/Engine/Source/Runtime/SlateCore/Public/Widgets/DeclarativeSyntaxSupport.h
[WidgetArgsType](API\Runtime\SlateCore\Widgets\TSlateBaseNamedArgs\WidgetArgsType) & AccessibleParams ( [TOptional](API\Runtime\Core\IO\TOptional)< [FAccessibleWidgetData](API\Runtime\SlateCore\Widgets\Accessibility\FAccessibleWidgetData) > InArg )